def from_config(cls):
"""
Create a Notifier instance with global configuration, typically environment variables.
"""
kwargs = dict(deployment_stage=Config.deployment_stage(),
delays=Config.notification_delays(),
num_workers=Config.notification_workers(),
timeout=Config.notification_timeout())
return cls(**{k: v for k, v in kwargs.items() if v is not None})
def test_notifier_from_config(self):
with mock.patch.dict(os.environ,
DSS_NOTIFY_DELAYS="",
DSS_NOTIFY_WORKERS="",
DSS_NOTIFY_ATTEMPTS=""):
self.assertFalse(Config.notification_is_async())
self.assertEqual(Config.notification_attempts(), 0)
self.assertEqual(Config.notification_delays(), [])
with mock.patch.dict(os.environ, DSS_NOTIFY_DELAYS="0"):
self.assertTrue(Config.notification_is_async())
self.assertEqual(Config.notification_attempts(), 1)
self.assertEqual(Config.notification_delays(), [0])
with mock.patch.dict(os.environ, DSS_NOTIFY_ATTEMPTS="0"):
self.assertEqual(Config.notification_attempts(), 0)
self.assertFalse(Config.notification_is_async())
with mock.patch.dict(os.environ,
DSS_NOTIFY_DELAYS="3 2 1 .5",
DSS_NOTIFY_WORKERS="7"):
notifier = Notifier.from_config()
self.assertEqual([3.0, 2.0, 1.0, .5], notifier._delays)
self.assertEqual(7, notifier._num_workers)
self.assertTrue(Config.notification_is_async())
self.assertEqual(Config.notification_attempts(), 4)
